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#1
07-06-2010, 05:46 PM
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What's This Hose For ?
Take a look at the picture on the first link :
Vacuum control See the Vacuum Pipe (part #6), and where it attaches to the rubber boot on the left. There's a recepticle nipple there for the hose, but just under that there is a much smaller nipple, almost small as a needle. See this link for a closer view : Hot-film air mass meter BMW X5 E53, X5 4.4i (M62) What is that smaller one for ? There is a tiny little hose coming off that and it laces it's way back to the rear of the engine somewhere. But I cannot find that little hose on any diagrams or part searches. Mine has actually broken off completely at the recepticle and I need to replace it but I have no idea what the hose is called, what it's for, where it goes or what it's part number is. Any ideas ? This is all part of an investigation I'm undertaking into a faint but noticable hesitation pattern in the engine while driving. Thanks !
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2001 X5 4.4i 
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#2
07-06-2010, 05:58 PM
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If the nipple on the intake boot broke you just need to replace the boot. If the hose end itself is deteriorated and broke there should be a plastic junction a couple feet down the line under the hood you could replace it from/to.
I don't remember exactly which hose that is, but I think it has to do with the fuel ventilation system. Maybe it goes to #11 in this link? RealOEM.com * BMW E53 X5 4.4i EXP.TANK/ACTIVATED CARBON CONTAINER
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"When you do things right, people won't be sure you've done anything at all" (Bender, futurama) You make something idiotproof, they'll make a better idiot You think professional is expensive, just wait until you pay for amateur. Never let your sense of morals prevent you from doing what is right. Examine what is said, not who speaks. X5 pics RIP 4.6is..... 2003 4.6is 
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#3
08-04-2011, 02:55 AM
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BUMP
I am having the exact same issue as the OP, That small nipple broke on mine, and the end of the hose is deteriorated. While I had the valve covers off, I couldn't even trace the hose then, so wherever the "junction" is, is pretty far down the line. I'm also having a very slight surging and a little bit of a rough idle, I'd like to take this obvious vacuum leak out of the equation. I'll order a new boot, and try to rig something up with the hose, but I'd like to know what that hose is for.
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